There are pressure sensitive pens that work with any Android/iOS cell phone via ultrasound. So I don't know about laptops, but all smartphones are capable of data transmission via ultrasound. I can't recall the last laptop I used that didn't work fine for Skype, so I don't think laptops are any worse, personally. Maybe 5 years ago one employer went cheap on a model without the built-in webcam on a laptop that usually had it, but even that had speakers and mic.